All About Eve tells the story of Margo Channing, one of the biggest stars on Broadway. But in spite of her unmatched success, she is beginning to show her age - "The Big 4-0." After a performance one night, she encounters a young woman named Eve Harrington, who claims to be her biggest fan and an aspiring actress. Gradually, Eve insinuates herself into Margo's life ultimately proving that she is nothing but a scheming woman who plans to take from Margo everything she holds dear: her lover, her friends, her stage career, and her fame.